High breakdown strength and energy density in antiferroelectric PLZST ceramics with Al2O3 buffer

Li, Chunyu; Yao, Manwen; Gao, Wenbin; Yao, Xi

doi:10.1016/j.ceramint.2019.09.025

Cited by 29 publications

(12 citation statements)

References 29 publications

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“…BDS increased from 16.04 kV/mm at x=0 to 25.57 kV/mm at x =0.02, and BDS increased by 60%. However, BDS decreased as x continue to increase, which is corresponding to other studies [19,20,22]. An excessive addition of Al 2 O 3 will lead to more Al 2 O 3 crystallites (con rmed in Fig.…”

Section: Resultssupporting

confidence: 86%

“…It is known that the dielectric breakdown strength of ceramic materials has a strong dependence on the grain size, with smaller grains giving higher dielectric breakdown strength (BDS) [17][18][19][20][21]. α-Al 2 O 3 , as a superior dielectric material, possesses a high breakdown strength (300-700 kV/mm) and high band gap (~9 eV) in conjunction with its excellent chemical and thermal properties [22]. Thus, Al 2 O 3 is a promising additive to achieve the intention of breakdown strength enhancement.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of α-Al2O3 Composite on Energy Storage Characteristics of the Orthogonal Phase PLZST Antiferroelectric Ceramics

Chen

Gao

et al. 2021

Preprint

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The effect of (1-x)(Pb0.97La0.02)(Zr0.675Sn0.285Ti0.04)O3-xAl2O3, with x=0~0.04, 0.08, 0.10 composite ceramic samples was studied. In this experiment, the PLZST powder was pre-fired to obtain the perovskite structure, and then combined with α-Al2O3 to increase the BDS of the ceramic. The test results show that the composite thick film samples are all perovskite orthorhombic phases, and Al2O3 is mainly filled in the grain gaps with a flaky structure. A proper content of composite Al2O3 can increase the density of ceramics. With x=0.02, the maximum value of BDS is 25.27 kV/mm, which is 60% higher than pure PLZST material, and the releasable energy storage density also reaches a maximum of 2.95 J/cm³. After the composite amount exceeds 0.03, the saturation polarization intensity decreases significantly. The energy storage efficiency of each sample is generally not high, all of which are less than 65%.

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Section: Resultssupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

The Effect of α-Al2O3 Composite on Energy Storage Characteristics of the Orthogonal Phase PLZST Antiferroelectric Ceramics

Chen

Gao

et al. 2021

Preprint

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“…Different sintering technologies, such as spark plasma sintering (SPS), two-step sintering, and the formation of coatings using chemical methods, − have also been shown to improve density and give rise to higher BDS and W rec .…”

Section: Principles Of Energy Storage In Electroceramicsmentioning

confidence: 99%

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

et al. 2021

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Materials exhibiting high energy/power density are currently needed to meet the growing demand of portable electronics, electric vehicles and large-scale energy storage devices. The highest energy densities are achieved for fuel cells, batteries, and supercapacitors, but conventional dielectric capacitors are receiving increased attention for pulsed power applications due to their high power density and their fast charge–discharge speed. The key to high energy density in dielectric capacitors is a large maximum but small remanent (zero in the case of linear dielectrics) polarization and a high electric breakdown strength. Polymer dielectric capacitors offer high power/energy density for applications at room temperature, but above 100 °C they are unreliable and suffer from dielectric breakdown. For high-temperature applications, therefore, dielectric ceramics are the only feasible alternative. Lead-based ceramics such as La-doped lead zirconate titanate exhibit good energy storage properties, but their toxicity raises concern over their use in consumer applications, where capacitors are exclusively lead free. Lead-free compositions with superior power density are thus required. In this paper, we introduce the fundamental principles of energy storage in dielectrics. We discuss key factors to improve energy storage properties such as the control of local structure, phase assemblage, dielectric layer thickness, microstructure, conductivity, and electrical homogeneity through the choice of base systems, dopants, and alloying additions, followed by a comprehensive review of the state-of-the-art. Finally, we comment on the future requirements for new materials in high power/energy density capacitor applications.

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“…Recently, many studies have been conducted to increase the breakdown of the electric field and energy storage density. Representatively, many research results have been reported on the composition of (Pb, La)(Zr, Sn, Ti)O 3 (PLZST) [9][10][11]. PLZST has a structure in which Sn 4+ is substituted for the B-site, which is an element site with a similar ionic radius in the PLZT composition.…”

Section: Introductionmentioning

confidence: 99%

Effects of the Sn4+ Substitution and the Sintering Additives on the Sintering Behavior and Electrical Properties of PLZT

et al. 2022

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(Pb, La)(Zr, Ti)O3 (PLZT) with antiferroelectric properties can be applied as a capacitor whose capacitance increases in a high electric field. From this, we obtained a high sintering density at 950 °C by adding low-temperature sintering additives, 8.0 wt% of PbO and 2.5 wt% of ZnO, simultaneously to a (Pb0.88, La0.12)(Zr0.86, Ti0.14)O3 composition. The change in electrical characteristics was confirmed in terms of Sn4+ substitution, resulting in no change in the sintering density by Sn4+ substitution. However, as the amount of Sn4+ substitution increases, the dielectric constant gradually decreases from 1300 to 700, and the grain size decreases from about 4 to 1 µm in terms of microstructure. In the crystal structure analysis, the general formation of a single perovskite structure was confirmed. The results of the hysteresis curve measurement revealed that the breakdown electric field increases from 4 to 9 kV·mm−1 as the amount of Sn4+ substitution gradually increases. However, polarization decreases in the same way as the permittivity trend. The composition exhibits excellent electrical properties when the ratio of Sn4+ is 0.4: a high energy storage density of 3.5 J·cm−3, energy efficiency of 80%, and breakdown electric field of about 8.5 kV·mm−1.

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High breakdown strength and energy density in antiferroelectric PLZST ceramics with Al2O3 buffer

Cited by 29 publications

References 29 publications

The Effect of α-Al2O3 Composite on Energy Storage Characteristics of the Orthogonal Phase PLZST Antiferroelectric Ceramics

The Effect of α-Al2O3 Composite on Energy Storage Characteristics of the Orthogonal Phase PLZST Antiferroelectric Ceramics

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

Effects of the Sn4+ Substitution and the Sintering Additives on the Sintering Behavior and Electrical Properties of PLZT

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